You can get into the iPhone or Android and copy the SQLite database to your computer.
The images can be tricky - some form of reference to the image in your phone, hard to put together; otherwise the messages in all the chats are in the database, navigable by a SQLite client.
Speaking from personal experience porting messages from iPhone to Android.
The images can be tricky - some form of reference to the image in your phone, hard to put together; otherwise the messages in all the chats are in the database, navigable by a SQLite client.
Speaking from personal experience porting messages from iPhone to Android.